[AtCoder] C - K Swap|PSAtCoder|Sorting-Problem Solving-Bucket Sort

C - K Swap

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[AtCoder] E - Lucky Numbers|PSAtCoder|Problem Solving-Hash Table-Math

E - Lucky Numbers

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[TopCoder] A0Paper|PSTopCoder|Problem Solving-Math

A0Paper

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[AtCoder] A - You should output ARC, though this is ABC.|PSAtCoder|Problem Solving-Matrix

A - You should output ARC, though this is ABC.

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[AtCoder] D - ±1 Operation 2|PSAtCoder|Problem Solving-Binary Search

D - ±1 Operation 2

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[AtCoder] C - ±1 Operation 1|PSAtCoder|Problem Solving-Binary Search

C - ±1 Operation 1

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[Codeforces] Round #718 (Div. 1 + Div. 2) C. Fillomino 2|PSCodeforces|Problem Solving-BFS-Heap-Greedy

Contest 2050 and Codeforces Round #718 (Div. 1 + Div. 2) C. Fillomino 2

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[Codeforces] Educational Round 108 (Rated for Div. 2) C. Berland Regional|PSCodeforces|Problem Solving-Hash Table-Prefix Sum

Educational Codeforces Round 108 (Rated for Div. 2) C. Berland Regional

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[Hacker Rank] Fibonacci Modified|PSHacker Rank|Problem Solving-Dynamic Programming

Fibonacci Modified

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[Hacker Rank] Counter game|PSHacker Rank|Problem Solving-Math-Bit Manipulation

Counter game

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